Introduction : New challenges to knowledge in the public sphere / Richard Hawkins and Michael Keren -- Establishing the public legitimacy and value of scientific knowledge in an information ether / Richard Hawkins -- Public intellectuals, media intellectuals, and academic intellectuals : comparing the space of opinion in Canada and the United States / Eleanor Townsley -- The eye of the swarm : collective intelligence and the public intellectual / Jacob G. Foster -- Creating the conditions for an intellectually active people : what today's public intellectual can learn from Anonymous / Liz Pirnie -- "Trust me--I'm a public intellectual" : Margaret Atwood's and David Suzuki's social epistemologies of climate science / Boaz Miller -- Engendering a new generation of public intellectuals : speaking truth to power with grace and humility / Karim-Aly Kassam -- Reflections on my dubious experience as a public intellectual / Barry Cooper -- Intellectual discourse online / Michael Keren.